package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.fasterxml.jackson.databind.ser.Serializers;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.HttpClientUtil;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.webSocket.WebSocketServer;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class OrderServiceImpl implements OrderService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private WeChatPayUtil weChatPayUtil;

    @Autowired
    private UserMapper userMapper;

    @Value("${sky.shop.address}")
    private  String shopAddress;

    @Value("${sky.baidu.ak}")
    private  String Ak;

    @Autowired
    private WebSocketServer webSocketServer;

    public static Long orderid;     //由于没真正执行paysuccess方法，得不到订单id，所以在新建订单时存储当前订单id
    public static String ordersNumber;  //用于代替paysuccess方法进行订单号的传递，为消息提醒做准备

    /**
     * 用户下单
     *
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //需要操作两个表，订单表order和订单明细表order_detail,以及清空购物车

        //一：处理各种异常（地址簿为空，购物车数据为空）
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        //检验下单距离是否合理
//        checkOfRange(addressBook.getCityName()+addressBook.getDistrictName()+addressBook.getDetail());

        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        //查询当前用户购物车数据
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if (shoppingCartList == null || shoppingCartList.size() == 0) {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //1.向订单插入1条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);

        orders.setUserId(userId);  //传过来的数据没有   //记得sql要返回订单的id以供订单明细表使用，所以加两个参数
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);   //支付状态
        orders.setStatus(Orders.PENDING_PAYMENT);  //订单待付款
        orders.setNumber(String.valueOf(System.currentTimeMillis()) + userId);  //订单号(使用时间戳+用户id)
        ordersNumber = orders.getNumber();

        //通过上面查过的地址薄中的数据给相关数据赋值
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());  //收货人

        //后来发现黑马课程的这里没将地址加入到数据库
        orders.setAddress(addressBook.getProvinceName() + addressBook.getCityName() + addressBook.getDistrictName());
//        orders.setAddress();

        orderMapper.insert(orders);

        //2.向订单明细表插入n条购物车数据
        //首先获得订单id
        Long ordersId = orders.getId();
        orderid = ordersId;

        List<OrderDetail> orderDetailList = new ArrayList<>();
        //取得购物车的数据
        for (ShoppingCart shopping_cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(shopping_cart, orderDetail);

            orderDetail.setOrderId(ordersId);   //设置订单id
            orderDetailList.add(orderDetail);
        }
        //批量插入到订单明细表
        orderDetailMapper.insertBarch(orderDetailList);

        //3.清空当前用户的购物车数据

        //直接调用
        shoppingCartMapper.cleanByUserId(userId);

        //4.封装VO对象返回

        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(ordersId)
                .orderAmount(orders.getAmount())
                .orderNumber(orders.getNumber())
                .orderTime(orders.getOrderTime())
                .build();

//        BeanUtils.copyProperties(orders,orderSubmitVO);

        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "苍穹外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );
//
//        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
//   throw new OrderBusinessException("该订单已支付");
//        }

        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code", "ORDERPAID");
//

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));


        //为替代微信支付成功后的数据库订单状态更新，多定义一个方法进行修改
        Integer OrderPaidStatus = Orders.PAID;  //支付状态，已支付
        Integer OrderStatus = Orders.TO_BE_CONFIRMED;   //订单状态，待接单

        //发现没有将支付时间 check_out属性赋值，所以在这里更新
        LocalDateTime check_out_time = LocalDateTime.now();

        orderMapper.updateStatus(OrderStatus, OrderPaidStatus, check_out_time, orderid);


        //支付成功后，通过webSocket进行消息的提醒，提醒商家接单
        //用map封装type(消息类型),orderId,content (内容) 后转换成json格式返回给客户端
        Map map = new HashMap();
        map.put("type",1);      //约定type 1表示来电提醒，2表示催单
        map.put("orderId",orderid);    //没调用微信支付，因此用全局参数传递orderId了
        map.put("content","订单号:"+ordersNumber);

        String jsonString = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(jsonString);

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

    }


    /**
     * 历史订单查询
     */
    public PageResult pageQuery4User(Integer pageNum, Integer pageSize, Integer status) {
        // 设置分页
        PageHelper.startPage(pageNum, pageSize);

        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);

        // 分页条件查询
        Page<Orders> page = orderMapper.pageQueryOrders(ordersPageQueryDTO);

        List<OrderVO> list = new ArrayList();

        // 查询出订单明细，并封装入OrderVO进行响应
        if (page != null && page.getTotal() > 0) {
            for (Orders orders : page) {
                Long orderId = orders.getId();// 订单id

                // 查询订单明细
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);

                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetails);

                list.add(orderVO);
            }
        }
        return new PageResult(page.getTotal(), list);
    }

    /**
     * 订单详情查询
     */
    public OrderVO details(Long id) {
        Orders orders = orderMapper.getById(id);  //获取订单信息

        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);   //OrderVO居然继承了Orders，6，疑惑解除

        orderVO.setOrderDetailList(orderDetailList);

        return orderVO;
    }

    /**
     * 取消订单
     */
    public void cancel(Long id) throws Exception {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        // 订单处于待接单状态下取消，需要进行退款
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            //调用微信支付退款接口
//            weChatPayUtil.refund(
//                    ordersDB.getNumber(), //商户订单号
//                    ordersDB.getNumber(), //商户退款单号
//                    new BigDecimal(0.01),//退款金额，单位 元
//                    new BigDecimal(0.01));//原订单金额

            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }

        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);

    }

    /**
     * 再来一单
     */
    @Transactional
    public void repetition(Long id) {
        //理解错误，应该是将原订单的购物车数据重新插入到数据库，需要将订单detail转换为购物车对象并插入shopping_cart表
        Long userId = BaseContext.getCurrentId();

        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        //转换对象类型
        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();

            // 将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
        }).collect(Collectors.toList());

        // 将购物车对象批量添加到数据库
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 订单条件查询
     */
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());

        //条件查询订单信息
        Page<Orders> pages = orderMapper.pageQueryOrders(ordersPageQueryDTO);

        //将订单包含的菜品存放到一个OrderVO的列表中，用一个字符串表示，需要转换和拼接
        //订单包含的菜品，以字符串形式展示

        //将Orders转换成orderVO，因为还要额外存储菜品数据
        List<OrderVO> orderVOList = getOrderVOList(pages);

        //封装返回结果
        return new PageResult(pages.getTotal(), orderVOList);
    }

    /**
     * 将Orders列表转换为OrderVO的列表
     */

    public List<OrderVO> getOrderVOList(Page<Orders> pages) {
        List<Orders> ordersList = pages.getResult();  //得到查询到的订单信息s

        List<OrderVO> orderVOList = new ArrayList<>();

        //订单不为空
        if (!CollectionUtils.isEmpty(ordersList)) {
            //将Orders转换成ordervo
            for (Orders orders : ordersList) {
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);

                String orderDishes = getorderDishes(orders.getId());

                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }

        return orderVOList;
    }

    /**
     * 根据订单id查询菜品信息并拼成字符串
     * orderDetail
     */
    String getorderDishes(Long orderId) {
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orderId);

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        return String.join("", orderDishList);
    }

    /**
     * 订单状态数量统计
     */
    public OrderStatisticsVO statistics() {

        //分别查询对应状态的订单数据数量
        Integer tobeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        //封装对象返回
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setToBeConfirmed(tobeConfirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);

        return orderStatisticsVO;

    }


    /**
     * 接单
     */
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        //将对应订单的状态更改为已接单即可即可(confirmed == 3)
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.update(orders);

    }

    /**
     * 拒单
     */
    public void reject(OrdersRejectionDTO ordersRejectionDTO) {
        //修改三个属性，一个是原因，一个是状态(6 已取消),还有取消时间
        //并且在用户已支付的状态下(payStatus == 1)，要进行退款操作(暂时实现不了，参考用户的自主取消功能中的退款)
        //漏掉了判断，只有当订单是待接单状态（2）时才能进行拒单

        Orders order = orderMapper.getById(ordersRejectionDTO.getId());

        if(order == null && !order.getStatus().equals(Orders.TO_BE_CONFIRMED)){
                throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = Orders.builder()
                .id(ordersRejectionDTO.getId())
                .rejectionReason(ordersRejectionDTO.getRejectionReason())
                .status(Orders.CANCELLED)
                .cancelTime(LocalDateTime.now())
                .build();

        //这里是退款操作

        orderMapper.update(orders);
    }

    /**
     * 取消订单
     */
    public void adminCancelOrder(OrdersCancelDTO ordersCancelDTO) {
        //更新订单状态，取消原因，有需要就退款
        //感觉不用判断订单状态，因为前端设置的是派送后才会显示取消按钮，而派送前显示的是拒单

        /**
         * 如果要实现退款，可以先查询数据库中对应订单，判断支付状态是不是为 Orders.PAID,
         * 然后进行退款请求
         */

        Orders orders = Orders.builder()
                .id(ordersCancelDTO.getId())
                .cancelReason(ordersCancelDTO.getCancelReason())
                .cancelTime(LocalDateTime.now())
                .status(Orders.CANCELLED)
                .build();

        orderMapper.update(orders);
    }

    /**
     * 订单派送
     * @param id
     */
    public void delivery(Long id) {
            //修改订单状态,  ,delivery_time是送达时间，暂时不赋值 delivery_status是用户选择送达的方法（立即，选择时间）

        //首先判断状态是不是待派送（已接单）
        Orders orderDb = orderMapper.getById(id);
        if(orderDb == null || !orderDb.getStatus().equals(Orders.CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orders.setId(id);

        orderMapper.update(orders);
    }

    /**
     * 完成订单
     * @param id
     */
    public void complete(Long id) {
        //修改订单状态，赋值送达时间delivery_time

        Orders orderDB = orderMapper.getById(id);

        //在派送中才能完成
        if(orderDB == null || !orderDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = Orders.builder()
                .id(id)
                .status(Orders.COMPLETED)
                .deliveryTime(LocalDateTime.now())
                .build();
        orderMapper.update(orders);
    }

    /**
     * 下单距离判断优化
     * 距离超过5公里，下单失败
     */
    private void checkOfRange(String address){
        Map map = new HashMap();
        map.put("address",shopAddress);
        map.put("output","json");
        map.put("ak",Ak);

        //获取店铺的经纬度坐标
        String shopCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        JSONObject jsonObject = JSON.parseObject(shopCoordinate);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("店铺地址解析失败");
        }

        //数据解析
        JSONObject location = jsonObject.getJSONObject("result").getJSONObject("location");
        String lat = location.getString("lat");
        String lng = location.getString("lng");
        //店铺经纬度坐标
        String shopLngLat = lat + "," + lng;

        map.put("address",address);
        //获取用户收货地址的经纬度坐标
        String userCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        jsonObject = JSON.parseObject(userCoordinate);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("收货地址解析失败");
        }

        //数据解析
        location = jsonObject.getJSONObject("result").getJSONObject("location");
        lat = location.getString("lat");
        lng = location.getString("lng");
        //用户收货地址经纬度坐标
        String userLngLat = lat + "," + lng;

        map.put("origin",shopLngLat);
        map.put("destination",userLngLat);
        map.put("steps_info","0");

        //路线规划
        String json = HttpClientUtil.doGet("https://api.map.baidu.com/directionlite/v1/driving", map);

        jsonObject = JSON.parseObject(json);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("配送路线规划失败");
        }

        //数据解析
        JSONObject result = jsonObject.getJSONObject("result");
        JSONArray jsonArray = (JSONArray) result.get("routes");
        Integer distance = (Integer) ((JSONObject) jsonArray.get(0)).get("distance");

        if(distance > 5000){
            //配送距离超过5000米
            throw new OrderBusinessException("超出配送范围");
        }
    }

    /**
     * 用户催单
     */
    public void reminder(Long id) {
        //通过webSocket推送消息进行提醒商家即可
        Map map = new HashMap();
        map.put("type",2);    //2为催单请求
        map.put("orderId",id);
        map.put("content","订单号:"+ordersNumber);

        String jsonString = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(jsonString);

    }
}
